clang/test/Sema/gnu-builtins.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify=gnu -std=gnu17 %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify=gnu -std=gnu2x %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify=std -std=c17 %s
   4 // RUN: %clang_cc1 -fsyntax-only -verify=std -std=c2x %s
   5
   6 // std-no-diagnostics
   7
   8 // 'index' is a builtin library function, but only in GNU mode. So this should
   9 // give an error in GNU modes but be okay in non-GNU mode.
  10 // FIXME: the error is correct, but these notes are pretty awful.
  11 int index; // gnu-error {{redefinition of 'index' as different kind of symbol}} \
  12               gnu-note {{unguarded header; consider using #ifdef guards or #pragma once}} \
  13               gnu-note {{previous definition is here}}